test: mark cpu-prof-dir-worker flaky on all

Refs: #27611 (comment)

Author: sam-github

test/sequential/sequential.status

@@ -5,6 +5,8 @@ prefix sequential
 # sample-test                       : PASS,FLAKY
 
 [true] # This section applies to all platforms
+# https://github.com/nodejs/node/issues/27611#issuecomment-613100468
+test-cpu-prof-dir-worker: PASS, FLAKY
 
 [$system==win32]
 # https://github.com/nodejs/node/issues/22327